Wallpaper Rollage Calculator Sum up for Individual Walls # Width Height Wall 1. ft. ft. Wall 2. ft. ft. Wall 3. ft. ft. Wall 4. ft. ft. OR Total Square Footage Area ft2 Deductions for Windows and Doors: Number of Standard Windows Number of Standard Doors Number of Double Openings Total Deductions Estimated No. of Single Rolls = ? Accept Clear Close Wallpaper Rollage Calculator is based on standard Repeats Lengths of up to 21" and may be accurate for even larger repeats. Total number of rolls required could depend on skills of installer to optimize for best coverage. This calculator is a good estimator to give you an idea but is not guaranteed to be 100% accurate. It is always a good idea to let the installer calculate the rollage for you too.